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ClinicalTrials.gov public records Last synced Oct 13, 2026, 6:44 AM EDT

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Showing 97–120 of 549 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: vitamin D3 (Replesta) Clear all
Terminated Phase 2 Interventional Results available

Calcitriol and Dexamethasone Before Radical Prostatectomy in Treating Patients With Localized Adenocarcinoma (Cancer) of the Prostate

NCT00084864
View directory record Official record
Conditions
Prostate Cancer
Interventions
calcitriol, dexamethasone, clinical observation
Dietary Supplement · Drug · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years to 120 Years · Male only
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2010
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jun 12, 2017 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Not applicable Interventional Results available

Vitamin D Supplementation on Cardiovascular Risk Factors

NCT01412710
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Cholecalciferol
Drug
Lead sponsor
Florida International University
Other
Eligibility
30 Years to 70 Years
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Dec 12, 2017 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Phase 1Phase 2 Interventional

Vitamin D Deficiency and Replacement on Pulmonary and Endocrine Function in SCI

NCT02099955
View directory record Official record
Conditions
Spinal Cord Injury, Vitamin D Deficiency
Interventions
Vitamin D3
Drug
Lead sponsor
James J. Peters Veterans Affairs Medical Center
Federal
Eligibility
18 Years to 75 Years
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Mar 7, 2017 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Not applicable Interventional

Efficacy of Vitamin D Supplementation in Obese Children

NCT02956408
View directory record Official record
Conditions
Obesity, Pediatric, Obesity, Childhood, Obesity, Morbid, Vitamin D Deficiency
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
5 Years to 11 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 5, 2020 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Not applicable Interventional

Differential Effects of Ergocalciferol and Cholecalciferol Therapies in Chronic Kidney Disease

NCT01835691
View directory record Official record
Conditions
Chronic Kidney Disease
Interventions
Vitamin D2 (ergocalciferol), Vitamin D3 (cholecalciferol)
Dietary Supplement
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Oct 19, 2017 · Synced Oct 13, 2026, 6:44 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D and Omega-3 Fatty Acids on Infectious Diseases and hCAP18 (VITAL Infection)

NCT01758081
View directory record Official record
Conditions
Infections, Human Cathelicidin Antimicrobial Peptide (hCAP-18)
Interventions
vitamin D3, omega-3 fatty acids (fish oil), Vitamin D3 placebo, fish oil placebo
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,874 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Vitamin D Supplementation in Healthy Adolescents

NCT01126671
View directory record Official record
Conditions
Vitamin D Supplementation
Interventions
Supplemental Vitamin D
Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
11 Years to 18 Years
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 4, 2018 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Effect of Vitamin D Repletion on Insulin Resistance and Systemic Inflammation

NCT01354964
View directory record Official record
Conditions
Insulin Resistance
Interventions
Vitamin D, Placebo
Drug
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
21 Years to 75 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Nov 2, 2020 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Not applicable Interventional

Vitamin D, Cardiovascular Disease, and African Americans

NCT01655810
View directory record Official record
Conditions
Vitamin D Deficiency, Type 2 Diabetes Mellitus, Cardiovascular Disease
Interventions
Vitamin D3, Calcium carbonate
Dietary Supplement
Lead sponsor
Washington University School of Medicine
Other
Eligibility
50 Years to 70 Years
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 5, 2020 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Not applicable Interventional Results available

Vitamin D Oral Replacement in Asthma

NCT03686150
View directory record Official record
Conditions
Asthma, Vitamin D Deficiency, Pediatric Obesity
Interventions
Vitamin D3 oral regimen
Dietary Supplement
Lead sponsor
IDeA States Pediatric Clinical Trials Network
Network
Eligibility
6 Years to 17 Years
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
15
States / cities
Little Rock, Arkansas • Wilmington, Delaware • Honolulu, Hawaii + 12 more
Source: ClinicalTrials.gov public record
Updated Apr 19, 2023 · Synced Oct 13, 2026, 6:44 AM EDT
Terminated Phase 2 Interventional Results available

High-Dose Cholecalciferol in Treating Patients Receiving Combination Chemotherapy and Bevacizumab as First-Line Therapy For Metastatic Colorectal Cancer

NCT01198548
View directory record Official record
Conditions
Stage IV Colon Cancer, Stage IV Rectal Cancer
Interventions
leucovorin calcium, bevacizumab, cholecalciferol, fluorouracil, oxaliplatin, pharmacological study
Drug · Biological · Dietary Supplement + 1 more
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years to 79 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jul 21, 2014 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Phase 4 Interventional

A Randomized Phase IV Control Trial of Single High Dose Oral Vitamin D3 in Pediatric Patients Undergoing HSCT

NCT03176849
View directory record Official record
Conditions
Vitamin D Deficiency, Stem Cell Transplant Complications, Pediatric Cancer, Blood Disorder, Pediatric Acute Myeloid Leukemia, Pediatric Acute Lymphoid Leukemia, Myelodysplastic Syndromes, Sickle Cell Anemia in Children, Aplastic Anemia, Thalassemia in Children
Interventions
Vitamin D3, Standard Vitamin D3 Supplementation
Dietary Supplement
Lead sponsor
Phoenix Children's Hospital
Other
Eligibility
1 Year to 25 Years
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Nov 17, 2020 · Synced Oct 13, 2026, 6:44 AM EDT
Terminated Phase 2 Interventional

Arsenic Trioxide and Cholecalciferol (Vitamin D) in Treating Patients With Myelodysplastic Syndromes

NCT00104806
View directory record Official record
Conditions
Leukemia, Myelodysplastic Syndromes, Myelodysplastic/Myeloproliferative Neoplasms
Interventions
cholecalciferol, arsenic trioxide
Dietary Supplement · Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
Up to 120 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 10, 2018 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Phase 3 Interventional Results available

Cholecalciferol Supplementation for Sepsis in the ICU

NCT01896544
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
Cholecalciferol, Placebo
Dietary Supplement
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 13, 2016 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Phase 2 Interventional

Calcitriol and Docetaxel in Treating Patients With Metastatic or Locally Advanced Pancreatic Cancer

NCT00238199
View directory record Official record
Conditions
Pancreatic Cancer
Interventions
calcitriol, docetaxel
Dietary Supplement · Drug
Lead sponsor
OHSU Knight Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2006
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 24, 2015 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Phase 2 Interventional Results available

Vitamin D3 Supplementation for Low-Risk Prostate Cancer: A Randomized Trial

NCT01759771
View directory record Official record
Conditions
Prostate Cancer
Interventions
Vitamin D3, Placebo
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
19 Years to 90 Years · Male only
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2020
U.S. locations
2
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Mar 18, 2024 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Phase 2 Interventional Results available

Calcitriol, Physical Activity, and Bone Health in Cancer Survivors

NCT00904033
View directory record Official record
Conditions
Breast Neoplasms, Bone and Bones
Interventions
Calcitriol, Exercise, Multivitamin
Drug · Behavioral · Dietary Supplement
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older · Female only
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2018
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Apr 23, 2019 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Phase 2 Interventional

Calcitriol in Treating Patients With a Rising PSA Level Following Treatment for Prostate Cancer

NCT00004043
View directory record Official record
Conditions
Prostate Cancer
Interventions
calcitriol
Dietary Supplement
Lead sponsor
OHSU Knight Cancer Institute
Other
Eligibility
18 Years to 120 Years · Male only
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2003
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 28, 2017 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Vitamin D and Calcium Homeostasis for Prevention of Type 2 Diabetes

NCT00436475
View directory record Official record
Conditions
Glucose Intolerance, Type 2 Diabetes Mellitus, Metabolic Syndrome
Interventions
Vitamin D3 2,000 IU orally once daily, Calcium Carbonate 400 mg orally twice daily, Vitamin D3-Placebo, Calcium-Placebo
Drug
Lead sponsor
Tufts Medical Center
Other
Eligibility
40 Years and older
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 30, 2019 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Not applicable Interventional

Vitamin D Effect on Calcium Absorption on Persons on Hemodialysis

NCT01325610
View directory record Official record
Conditions
Chronic Kidney Disease, End Stage Renal Disease, Vitamin D Deficiency
Interventions
cholecalciferol
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
19 Years and older
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Apr 4, 2012 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Not applicable Interventional

The Effect of Vitamin D Repletion on Small Low Density Lipoprotein (LDL) Particle Number in Subjects at Elevated Cardiovascular Risk

NCT01008384
View directory record Official record
Conditions
Atherosclerosis
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Rockefeller University
Other
Eligibility
18 Years to 85 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 1, 2012 · Synced Oct 13, 2026, 6:44 AM EDT
Enrolling by invitation Not applicable Interventional

Virtual Lifestyle Intervention for Weight Management and Cardiovascular Heal

NCT07572721
View directory record Official record
Conditions
Cardiovascular Risk Factor
Interventions
Multicomponent Virtual Lifestyle Intervention
Behavioral
Lead sponsor
Truemedicine Inc
Other
Eligibility
30 Years to 60 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Phase 4 Interventional Results available

Vitamin D Plus Fluticasone Propionate

NCT01103934
View directory record Official record
Conditions
Seasonal Allergic Rhinitis
Interventions
Vitamin D3, Placebo, Fluticasone Propionate
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 45 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 9, 2014 · Synced Oct 13, 2026, 6:44 AM EDT
Completed Phase 1 Interventional

Ultra-high Dose Vitamin D for HSCT

NCT03759262
View directory record Official record
Conditions
Hematopoietic Stem Cell Transplant
Interventions
Cholecalciferol
Drug
Lead sponsor
Children's Hospital Los Angeles
Other
Eligibility
0 Years to 25 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 20, 2024 · Synced Oct 13, 2026, 6:44 AM EDT